Merge pull request #11064 from agh1/revert-close-button

CRM-21055 Revert change of "cancel" to "close" on backend contribution form

CRM/Contribute/Form/Contribution.php

@@ -828,7 +828,7 @@ class CRM_Contribute_Form_Contribution extends CRM_Contribute_Form_AbstractEditP
         ),
         array(
           'type' => 'cancel',
-          'name' => ts('Close'),
+          'name' => ts('Cancel'),
         ),
       )
     );